Talaksan:Talc schist 1 (16922837125).jpg
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Ito ay isang talaksan mula sa Wikimedia Commons. Makikita sa ibaba ang impormasyon mula sa pahina ng paglalarawan nito roon. |
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PaglalarawanTalc schist 1 (16922837125).jpg |
Talc schist (9.0 centimeters across at its widest) Metamorphic rocks result from intense alteration of any previously existing rocks by heat and/or pressure and/or chemical change. This can happen as a result of regional metamorphism (large-scale tectonic events, such as continental collision or subduction), burial metamorphism (super-deep burial), contact metamorphism (by the heat & chemicals from nearby magma or lava), hydrothermal metamorphism (by superheated groundwater), shear metamorphism (in or near a fault zone), or shock metamorphism (by an impact event). Other categories include thermal metamorphism, kinetic metamorphism, and nuclear metamorphism. Many metamorphic rocks have a foliated texture, but some are crystalline or glassy. Schist is an intermediate- to high-grade, foliated metamorphic rock. It is highly variable in appearance, depending on the mineral content, which is a function of the precursor rock and specific temperature-pressure conditions. Garden-variety schists form by metamorphism of phyllites. Schists typically have medium- to large-sized crystals, unlike the microcrystalline nature of slate & phyllite. Schist's foliated texture (= crystals aligned into bands or stripes or layers) is often only seen when specimens are viewed on edge. Talc schist is a metamorphic rock dominated by the mineral talc. Many samples have a mottled creamy white color, with pearly luster, and a slick & soapy feel. Talc schist, like soapstone and steatite and the mineral talc itself, is very soft (H = 1). Unlike soapstone and steatite (= talcose, crystalline-textured metamorphic rocks), talc schist has a foliated texture (in the sample shown above, the foliation is only seen when viewing the rock on edge). Some talc schists have formed by hydrothermal metamorphism of dolomitic marbles. Other talc schists are produced by hydrothermal metamorphism of serpentinized peridotites. |
Petsa | |
Pinanggalingan | Talc schist 1 |
May-akda | James St. John |
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/16922837125 (archive). It was reviewed on 2 Disyembre 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
2 Disyembre 2019
Items portrayed in this file
depicts English
creator English
some value
copyright status English
copyrighted English
copyright license English
24 Marso 2015
source of file English
file available on the internet English
media type English
image/jpeg
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Araw/Oras | Thumbnail | Mga dimensiyon | tagagamit | Kumento | |
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ngayon | 06:23, 2 Disyembre 2019 | 1,841 × 777 (1.7 MB) | Ser Amantio di Nicolao | Transferred from Flickr via #flickr2commons |
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Naglalaman ng mga karagdagang impormasyon ang talaksan na ito, marahil nadagdag mula sa kamerang digital o scanner na ginamit upang makalikha o gawing digital ito. Kung nabago ang talaksan mula sa orihinal na katayuan, maaaring hindi maipapakita ng lubusan ang detalye ng binagong larawan.
Komposisyon ng pixel | RGB |
---|---|
Oryentasyon | Karaniwan |
Pahigang resolusyon | 500 dpi |
Patayong resolusyon | 500 dpi |
Ginamit na software | Adobe Photoshop CS2 Macintosh |
Araw at oras ng pagpapalit ng talaksan | 23:09, 24 Marso 2015 |
Espasyo ng kulay | Hindi nakaakma sa pamantayang sukat |
Balidong taas ng larawan | 1,841 px |
Balidong lapad ng larawan | 777 px |
Araw at oras ng ginawang digital | 19:08, 24 Marso 2015 |
Petsa kung kailang huling binago ang metadato | 19:09, 24 Marso 2015 |